T
tccooper1@comcast.net
Tue, Sep 16, 2025 3:34 PM
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
-
Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
-
Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
-
Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
RC
Richard Cohen
Tue, Sep 16, 2025 3:40 PM
Where under the Vberth. In the immediate compartment under the bed or the "sub basement" where the bow thruster lives
Richard Cohen
508-265-7277
Typed with my thumbs and voice to text, please excuse any typos and the brevity.
From: Tim Cooper via Sentoa sentoa@lists.sentoa.org
Sent: Tuesday, September 16, 2025 11:34:50 AM
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net tccooper1@comcast.net
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
-
Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
-
Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
-
Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Where under the Vberth. In the immediate compartment under the bed or the "sub basement" where the bow thruster lives
Richard Cohen
508-265-7277
Typed with my thumbs and voice to text, please excuse any typos and the brevity.
________________________________
From: Tim Cooper via Sentoa <sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 11:34:50 AM
To: sentoa@lists.sentoa.org <sentoa@lists.sentoa.org>
Cc: tccooper1@comcast.net <tccooper1@comcast.net>
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
DC
David Cheyette
Tue, Sep 16, 2025 3:47 PM
Hi
We have 37-100 (2004 model). At one time we found that there was a hole in the anchor chain locker that was leaking into the V-Berth area down near the thruster. It was a very small hole; we patched and it solved that problem.
We haven’t (yet) had problems with the hanging lockers – but my suspicion is either the stainless-steel rail bases, or the forward cleats may need to be rebedded. I’ve worried about that for a lot of years, and am not clear how that can be done. Maybe others have already done this on their boats and can suggest something.
Good luck!
David Cheyette
Maisy, 37-100
Friday Harbor, WA
From: Tim Cooper via Sentoa sentoa@lists.sentoa.org
Sent: Tuesday, September 16, 2025 8:35 AM
To: sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
- Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
- Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
- Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Hi
We have 37-100 (2004 model). At one time we found that there was a hole in the anchor chain locker that was leaking into the V-Berth area down near the thruster. It was a very small hole; we patched and it solved that problem.
We haven’t (yet) had problems with the hanging lockers – but my suspicion is either the stainless-steel rail bases, or the forward cleats may need to be rebedded. I’ve worried about that for a lot of years, and am not clear how that can be done. Maybe others have already done this on their boats and can suggest something.
Good luck!
David Cheyette
Maisy, 37-100
Friday Harbor, WA
From: Tim Cooper via Sentoa <sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 8:35 AM
To: sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
BM
Ben McCafferty
Tue, Sep 16, 2025 3:47 PM
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa sentoa@lists.sentoa.org wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
> On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.org> wrote:
>
> After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
>
> Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
>
> Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
>
> Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
>
> Thanks
>
> Tim Cooper 37-059 Time To Play
>
>
>
> _______________________________________________
> Sentoa mailing list -- sentoa@lists.sentoa.org
> To unsubscribe send an email to sentoa-leave@lists.sentoa.org
TC
Tim Cooper
Tue, Sep 16, 2025 4:20 PM
Richard,
There is water just forward of the thruster tunnel and back by the thruster
battery. The battery is at the foot of the bed forward of the bulkhead
between the stateroom and hall.
My assumption is that the water is coming in forward of the thruster and
then rolls over the tunnel when full or the bow raises.
Tim
From: Richard Cohen via Sentoa sentoa@lists.sentoa.org
Sent: Tuesday, September 16, 2025 8:40 AM
To: South East Nordic Tugs Owners' Association (SENTOA)
sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net; Richard Cohen rcohen@bostoncio.com
Subject: [Sentoa] Re: NT37 Leaks
Where under the Vberth. In the immediate compartment under the bed or the
"sub basement" where the bow thruster lives
Richard Cohen
508-265-7277
Typed with my thumbs and voice to text, please excuse any typos and the
brevity.
From: Tim Cooper via Sentoa < mailto:sentoa@lists.sentoa.org
sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 11:34:50 AM
To: mailto:sentoa@lists.sentoa.org sentoa@lists.sentoa.org <
mailto:sentoa@lists.sentoa.org sentoa@lists.sentoa.org>
Cc: mailto:tccooper1@comcast.net tccooper1@comcast.net <
mailto:tccooper1@comcast.net tccooper1@comcast.net>
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now
it is time to address them. I have gone through the archive and seen
mentions but no definite solutions. I will report back once leaks are
identified and fixed. I would appreciate any help or guidance from all.
- Saltwater under V-berth, this has existed since we have owned the
boat 2018, I think. I dried it out near the thruster battery and up by the
thruster. Just sitting no water, after cruising both places have saltwater.
The level is always the same because excess flows to bilge pump. We are
normally in freshwater so it hasn't been a big concern but now it is time to
dry it out.
- Saltwater soaked floor in starboard hanging locker or closet. Using
a moisture meter I haven't found the path for the water. The walls in the
closet are dry. This summer is the first time we have seen this.
- Saltwater soaked floor in port hanging locker or closet. I haven't
done any investigation yet but it doesn't seem to be as bad as the starboard
side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Richard,
There is water just forward of the thruster tunnel and back by the thruster
battery. The battery is at the foot of the bed forward of the bulkhead
between the stateroom and hall.
My assumption is that the water is coming in forward of the thruster and
then rolls over the tunnel when full or the bow raises.
Tim
From: Richard Cohen via Sentoa <sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 8:40 AM
To: South East Nordic Tugs Owners' Association (SENTOA)
<sentoa@lists.sentoa.org>
Cc: tccooper1@comcast.net; Richard Cohen <rcohen@bostoncio.com>
Subject: [Sentoa] Re: NT37 Leaks
Where under the Vberth. In the immediate compartment under the bed or the
"sub basement" where the bow thruster lives
Richard Cohen
508-265-7277
Typed with my thumbs and voice to text, please excuse any typos and the
brevity.
_____
From: Tim Cooper via Sentoa < <mailto:sentoa@lists.sentoa.org>
sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 11:34:50 AM
To: <mailto:sentoa@lists.sentoa.org> sentoa@lists.sentoa.org <
<mailto:sentoa@lists.sentoa.org> sentoa@lists.sentoa.org>
Cc: <mailto:tccooper1@comcast.net> tccooper1@comcast.net <
<mailto:tccooper1@comcast.net> tccooper1@comcast.net>
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now
it is time to address them. I have gone through the archive and seen
mentions but no definite solutions. I will report back once leaks are
identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the
boat 2018, I think. I dried it out near the thruster battery and up by the
thruster. Just sitting no water, after cruising both places have saltwater.
The level is always the same because excess flows to bilge pump. We are
normally in freshwater so it hasn't been a big concern but now it is time to
dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using
a moisture meter I haven't found the path for the water. The walls in the
closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven't
done any investigation yet but it doesn't seem to be as bad as the starboard
side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
TC
Tim Cooper
Tue, Sep 16, 2025 4:20 PM
Ben,
I will checkout the ports. The walls, locker ceiling and floors are carpeted, as well, the entire stateroom is carpeted. There is some delamination of the carpet but not enough to get a good look. I do have a dark spot on the ceiling of the locker and a lot of silicon all over the exterior of the ports. I think they had issues in the past. When I tested it was dry but I might have been late in testing. The locker was full of the wife’s clothes and there were no wet clothes, so I had eliminated dripping.
Tim
From: Ben McCafferty bmacpiper@me.com
Sent: Tuesday, September 16, 2025 8:48 AM
To: South East Nordic Tugs Owners' Association (SENTOA) sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net
Subject: Re: [Sentoa] NT37 Leaks
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.org mailto:sentoa@lists.sentoa.org > wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
- Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
- Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
- Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Sentoa mailing list -- sentoa@lists.sentoa.org mailto:sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org mailto:sentoa-leave@lists.sentoa.org
Ben,
I will checkout the ports. The walls, locker ceiling and floors are carpeted, as well, the entire stateroom is carpeted. There is some delamination of the carpet but not enough to get a good look. I do have a dark spot on the ceiling of the locker and a lot of silicon all over the exterior of the ports. I think they had issues in the past. When I tested it was dry but I might have been late in testing. The locker was full of the wife’s clothes and there were no wet clothes, so I had eliminated dripping.
Tim
From: Ben McCafferty <bmacpiper@me.com>
Sent: Tuesday, September 16, 2025 8:48 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: tccooper1@comcast.net
Subject: Re: [Sentoa] NT37 Leaks
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.org <mailto:sentoa@lists.sentoa.org> > wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
_______________________________________________
Sentoa mailing list -- sentoa@lists.sentoa.org <mailto:sentoa@lists.sentoa.org>
To unsubscribe send an email to sentoa-leave@lists.sentoa.org <mailto:sentoa-leave@lists.sentoa.org>
RC
Richard Cohen
Tue, Sep 16, 2025 4:22 PM
On our 37 (NT37-079) the grey water and head sink drains exited above the waterline so unlikely sources.
I replace the entire bow thruster which the factory had installed with 5200, there is a relatively small mounting surface on the thruster leg, but I suspect it is not that. If there is water intrusion there it should be obvious inside the grey metal mount under the motor. If you want/need to take out the bow thruster you need a 17mm cone wrench to hold the bolts behind cables on the lugs. https://www.amazon.com/Bikehand-Bicycle-Install-Remover-Spanner/dp/B089GFQQZT/ref=sr_1_3_sspa?crid=1OD9EX0MS238I&dib=eyJ2IjoiMSJ9.q9PUpcLcHu5-oji8GxuqT6awXifI3ehvILf1rn-EzqC7N64EGBJjbgYwRviDKL_lff0tz26L9Jb_G29I4ab_22OchfNMSCU_VXsbh9ctz3w49Z20WyFRUvqPbWF2qVHD8FBzQHI_YZurqXzIPDXyOSOj33PxDWeJtqJAF9QZzzqM0xMgC0FkosWqOE_waucuc9Q7orOmCYXhpi5VKHe6Wyck7T9MKf0Hmsb9_sQDt3nRHy9Wob06oMKeBpUbUntS9taJukmHp6kldst1gYemtizohl5CD50fQi1QwOH7pQ0.60ictV96fSqUnTkHmqdYIDOJjGPUGpQNopGRaCCG24w&dib_tag=se&keywords=17mm%2Bcone%2Bwrench&qid=1758039408&sprefix=17mm%2Bcone%2B%2Caps%2C136&sr=8-3-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1&psc=1. Do not remove the cables without holding those backing nuts
My assumption is that significant saltwater leakage from the railing and other deck hardware would be hard to produce that much water, if it were fresh water from rain or hose that would make more sense.
I always used modeling clay wrapped around the chain in the hawser under the windless. In rough weather that can let in a ton of salt water. I might try a hose into that hawser and see if that flows into the under bunk area.
Good luck
Richard Cohen
Managing Partner
BOSTONhttp://www.bostoncio.com/CIO http://www.bostoncio.com/
BostonCIO LLC
(508) 265-7277tel:(508)%20265-7277
RCohen@BostonCIO.commailto:rcohen@bostoncio.com
Facebookhttps://www.facebook.com/BostonCIO-LLC-209170469076/ | LinkedInhttps://www.linkedin.com/company/bostoncio-llc
From: Ben McCafferty via Sentoa sentoa@lists.sentoa.org
Sent: Tuesday, September 16, 2025 11:48 AM
To: South East Nordic Tugs Owners' Association (SENTOA) sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net; Ben McCafferty bmacpiper@me.com
Subject: [Sentoa] Re: NT37 Leaks
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
- Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
- Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
- Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org
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On our 37 (NT37-079) the grey water and head sink drains exited above the waterline so unlikely sources.
I replace the entire bow thruster which the factory had installed with 5200, there is a relatively small mounting surface on the thruster leg, but I suspect it is not that. If there is water intrusion there it should be obvious inside the grey metal mount under the motor. If you want/need to take out the bow thruster you need a 17mm cone wrench to hold the bolts behind cables on the lugs. https://www.amazon.com/Bikehand-Bicycle-Install-Remover-Spanner/dp/B089GFQQZT/ref=sr_1_3_sspa?crid=1OD9EX0MS238I&dib=eyJ2IjoiMSJ9.q9PUpcLcHu5-oji8GxuqT6awXifI3ehvILf1rn-EzqC7N64EGBJjbgYwRviDKL_lff0tz26L9Jb_G29I4ab_22OchfNMSCU_VXsbh9ctz3w49Z20WyFRUvqPbWF2qVHD8FBzQHI_YZurqXzIPDXyOSOj33PxDWeJtqJAF9QZzzqM0xMgC0FkosWqOE_waucuc9Q7orOmCYXhpi5VKHe6Wyck7T9MKf0Hmsb9_sQDt3nRHy9Wob06oMKeBpUbUntS9taJukmHp6kldst1gYemtizohl5CD50fQi1QwOH7pQ0.60ictV96fSqUnTkHmqdYIDOJjGPUGpQNopGRaCCG24w&dib_tag=se&keywords=17mm%2Bcone%2Bwrench&qid=1758039408&sprefix=17mm%2Bcone%2B%2Caps%2C136&sr=8-3-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1&psc=1. Do not remove the cables without holding those backing nuts
My assumption is that significant saltwater leakage from the railing and other deck hardware would be hard to produce that much water, if it were fresh water from rain or hose that would make more sense.
I always used modeling clay wrapped around the chain in the hawser under the windless. In rough weather that can let in a ton of salt water. I might try a hose into that hawser and see if that flows into the under bunk area.
Good luck
Richard Cohen
Managing Partner
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BostonCIO LLC
(508) 265-7277<tel:(508)%20265-7277>
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From: Ben McCafferty via Sentoa <sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 11:48 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: tccooper1@comcast.net; Ben McCafferty <bmacpiper@me.com>
Subject: [Sentoa] Re: NT37 Leaks
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.org<mailto:sentoa@lists.sentoa.org>> wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
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PB
Paul Bulk
Tue, Sep 16, 2025 5:15 PM
I have had 2 of these.
Sea water can enter the anchor locker during anchoring or rough weather through the anchor hawse hole. The drain at the bottom is supposed to let this out but, a) my drain was clogged and, b) there seemed to be cracks in the bottom of the anchor locker that would let that water seep into the thruster area. From what I understand, a common problem. I fixed the drain and re-sealed the locker.
2.
Sea water can soak the Starboard side via the exhaust. Check pipes and connections, especially around the water muffler. Hopefully it isn't that, because exhaust problems are expensive and difficult. There is a wealth of information about wet-exhaust isssues on many forums including PaNNTOA and SENTOA. I have re-built mine from the turbo to the muffler.
3.
Not sure where this would come from.
Cheers
Paul Bulk
Victoria BC
Crown Prince
32-191
From: Tim Cooper via Sentoa sentoa@lists.sentoa.org
Sent: Tuesday, September 16, 2025 3:34 PM
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net tccooper1@comcast.net
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
-
Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
-
Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
-
Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
I have had 2 of these.
1.
Sea water can enter the anchor locker during anchoring or rough weather through the anchor hawse hole. The drain at the bottom is supposed to let this out but, a) my drain was clogged and, b) there seemed to be cracks in the bottom of the anchor locker that would let that water seep into the thruster area. From what I understand, a common problem. I fixed the drain and re-sealed the locker.
2.
Sea water can soak the Starboard side via the exhaust. Check pipes and connections, especially around the water muffler. Hopefully it isn't that, because exhaust problems are expensive and difficult. There is a wealth of information about wet-exhaust isssues on many forums including PaNNTOA and SENTOA. I have re-built mine from the turbo to the muffler.
3.
Not sure where this would come from.
Cheers
Paul Bulk
Victoria BC
Crown Prince
32-191
________________________________
From: Tim Cooper via Sentoa <sentoa@lists.sentoa.org>
Sent: Tuesday, September 16, 2025 3:34 PM
To: sentoa@lists.sentoa.org <sentoa@lists.sentoa.org>
Cc: tccooper1@comcast.net <tccooper1@comcast.net>
Subject: [Sentoa] NT37 Leaks
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
1. Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
2. Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
3. Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
TP
Tom Patterson
Tue, Sep 16, 2025 5:59 PM
When I bought 32-251 (2005) in 2023 there was a leak in the bow area that only happened underway. Having read that others had anchor chain locker leak issues I completely re-did the bottom of the locked. That didn’t solve the problem.
Finally, while hauled out, I removed the long black vertical plastic pieces on the bow and discovered they were fastened with sheet metal screws that completely penetrated the hull, but due to the fiberglass conduit for the windless wiring that runs vertically inside the chain locker I could not see the inside area. That was my leak. I now have a completely dry forward area.
~Tom
32-251 (2005)
On Sep 16, 2025, at 08:35, Tim Cooper via Sentoa sentoa@lists.sentoa.org wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org
When I bought 32-251 (2005) in 2023 there was a leak in the bow area that only happened underway. Having read that others had anchor chain locker leak issues I completely re-did the bottom of the locked. That didn’t solve the problem.
Finally, while hauled out, I removed the long black vertical plastic pieces on the bow and discovered they were fastened with sheet metal screws that completely penetrated the hull, but due to the fiberglass conduit for the windless wiring that runs vertically inside the chain locker I could not see the inside area. That was my leak. I now have a completely dry forward area.
~Tom
32-251 (2005)
> On Sep 16, 2025, at 08:35, Tim Cooper via Sentoa <sentoa@lists.sentoa.org> wrote:
>
>
> After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
>
> Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
>
> Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
>
> Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
>
> Thanks
>
> Tim Cooper 37-059 Time To Play
>
>
>
> _______________________________________________
> Sentoa mailing list -- sentoa@lists.sentoa.org
> To unsubscribe send an email to sentoa-leave@lists.sentoa.org
BM
Ben McCafferty
Tue, Sep 16, 2025 6:31 PM
OK, maybe that’s a start! When we bought our boat (37-202), the main stateroom seals were both crooked and leaking. All it took was a moment to straighten them out and that problem was fixed. I wonder if maybe the silicon was trying to address that, but was the wrong problem? Pretty unusual for a properly bedded porthole to leak around its perimeter, at least in my experience.
Re: clothes, I could see the leaking just running down the back wall (as you face it), so perhaps clothes could stay dry in that case?
Cheers,
b
On Sep 16, 2025, at 09:20, Tim Cooper tccooper1@comcast.net wrote:
Ben,
I will checkout the ports. The walls, locker ceiling and floors are carpeted, as well, the entire stateroom is carpeted. There is some delamination of the carpet but not enough to get a good look. I do have a dark spot on the ceiling of the locker and a lot of silicon all over the exterior of the ports. I think they had issues in the past. When I tested it was dry but I might have been late in testing. The locker was full of the wife’s clothes and there were no wet clothes, so I had eliminated dripping.
Tim
From: Ben McCafferty bmacpiper@me.com
Sent: Tuesday, September 16, 2025 8:48 AM
To: South East Nordic Tugs Owners' Association (SENTOA) sentoa@lists.sentoa.org
Cc: tccooper1@comcast.net
Subject: Re: [Sentoa] NT37 Leaks
For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
Curious what you find!
On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.org mailto:sentoa@lists.sentoa.org> wrote:
After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
Thanks
Tim Cooper 37-059 Time To Play
Sentoa mailing list -- sentoa@lists.sentoa.org mailto:sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org mailto:sentoa-leave@lists.sentoa.org
OK, maybe that’s a start! When we bought our boat (37-202), the main stateroom seals were both crooked and leaking. All it took was a moment to straighten them out and that problem was fixed. I wonder if maybe the silicon was trying to address that, but was the wrong problem? Pretty unusual for a properly bedded porthole to leak around its perimeter, at least in my experience.
Re: clothes, I could see the leaking just running down the back wall (as you face it), so perhaps clothes could stay dry in that case?
Cheers,
b
> On Sep 16, 2025, at 09:20, Tim Cooper <tccooper1@comcast.net> wrote:
>
> Ben,
> I will checkout the ports. The walls, locker ceiling and floors are carpeted, as well, the entire stateroom is carpeted. There is some delamination of the carpet but not enough to get a good look. I do have a dark spot on the ceiling of the locker and a lot of silicon all over the exterior of the ports. I think they had issues in the past. When I tested it was dry but I might have been late in testing. The locker was full of the wife’s clothes and there were no wet clothes, so I had eliminated dripping.
> Tim
>
> From: Ben McCafferty <bmacpiper@me.com>
> Sent: Tuesday, September 16, 2025 8:48 AM
> To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
> Cc: tccooper1@comcast.net
> Subject: Re: [Sentoa] NT37 Leaks
>
> For both hanging lockers I’d suspect the portholes. The rubber seal in ours has to be perfectly “square” to seal properly. With a little twist in the seal it leaks, and that’s a straight shot down to your locker floors. I know you said walls are dry, but perhaps they dried after the leak and puddling happened? Are the walls carpeted? Have a look at the top of the lockers just below the portholes also—ours are slightly delaminated from other owners (and us) having had a leak there.
>
> V-berth, the obvious thought there would be to start with the penetration of the thruster and go from there. Nothing else comes to mind right away, but perhaps another penetration nearby (grey water thru hull, head sink thru hull, etc.?).
>
> Curious what you find!
>
>
>> On Sep 16, 2025, at 08:34, Tim Cooper via Sentoa <sentoa@lists.sentoa.org <mailto:sentoa@lists.sentoa.org>> wrote:
>>
>> After cruising this summer we have more leaks than we were aware of so now it is time to address them. I have gone through the archive and seen mentions but no definite solutions. I will report back once leaks are identified and fixed. I would appreciate any help or guidance from all.
>> Saltwater under V-berth, this has existed since we have owned the boat 2018, I think. I dried it out near the thruster battery and up by the thruster. Just sitting no water, after cruising both places have saltwater. The level is always the same because excess flows to bilge pump. We are normally in freshwater so it hasn’t been a big concern but now it is time to dry it out.
>> Saltwater soaked floor in starboard hanging locker or closet. Using a moisture meter I haven’t found the path for the water. The walls in the closet are dry. This summer is the first time we have seen this.
>> Saltwater soaked floor in port hanging locker or closet. I haven’t done any investigation yet but it doesn’t seem to be as bad as the starboard side. This summer is the first time we have seen this.
>> Thanks
>>
>> Tim Cooper 37-059 Time To Play
>>
>>
>> _______________________________________________
>> Sentoa mailing list -- sentoa@lists.sentoa.org <mailto:sentoa@lists.sentoa.org>
>> To unsubscribe send an email to sentoa-leave@lists.sentoa.org <mailto:sentoa-leave@lists.sentoa.org>